"We don't know quite what will happen. Curiosity may very well rapidly degrade to reveal its innermost secret or maybe the effects of automatically removing cubelets will be neutralized by players keen to keep Curiosity going."

- A note from Peter Molyneux's 22cans tells users they can pay to reverse the progress made by others in Curiosity.

The game has been available for several months now, and has players tapping "cubelets" to remove layers from a cube. There is apparently a secret to be revealed beneath the last layer for whoever chips away the last cubelet.

Now the studio has added the option for players to pay to actually add more pieces to the cube rather than chip them away as usual, reversing the process for 99 cents, $6.99 or $10.99, depending on the amount of cubelets. Some users have actually already paid to remove a large number of cubelets all in one go, thanks to a previous in-app purchase.

As noted by Eurogamer, players have so far paid to remove nearly 14 million cubelets, while adding an extra 4.7 million. Molyneux has described being able to both add and remove cubelets as a "war of attrition."